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#ifndef _RPMUTIL_H
#define _RPMUTIL_H
#include <unistd.h>
/** \file rpmio/rpmutil.h
*
* Miscellaneous utility macros:
* - portability wrappers for various gcc extensions like __attribute__()
* - ...
*
* Copied from glib, names replaced to avoid clashing with glib.
*
*/
/* Here we provide RPM_GNUC_EXTENSION as an alias for __extension__,
* where this is valid. This allows for warningless compilation of
* "long long" types even in the presence of '-ansi -pedantic'.
*/
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
# define RPM_GNUC_EXTENSION __extension__
#else
# define RPM_GNUC_EXTENSION
#endif
/* Provide macros to feature the GCC function attribute.
*/
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
#define RPM_GNUC_PURE \
__attribute__((__pure__))
#define RPM_GNUC_MALLOC \
__attribute__((__malloc__))
#else
#define RPM_GNUC_PURE
#define RPM_GNUC_MALLOC
#endif
#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
#define RPM_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
#define RPM_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
#else
#define RPM_GNUC_ALLOC_SIZE(x)
#define RPM_GNUC_ALLOC_SIZE2(x,y)
#endif
#if __GNUC__ >= 4
#define RPM_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
#else
#define RPM_GNUC_NULL_TERMINATED
#endif
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
#define RPM_GNUC_PRINTF( format_idx, arg_idx ) \
__attribute__((__format__ (__printf__, format_idx, arg_idx)))
#define RPM_GNUC_SCANF( format_idx, arg_idx ) \
__attribute__((__format__ (__scanf__, format_idx, arg_idx)))
#define RPM_GNUC_FORMAT( arg_idx ) \
__attribute__((__format_arg__ (arg_idx)))
#define RPM_GNUC_NORETURN \
__attribute__((__noreturn__))
#define RPM_GNUC_CONST \
__attribute__((__const__))
#define RPM_GNUC_UNUSED \
__attribute__((__unused__))
#define RPM_GNUC_NO_INSTRUMENT \
__attribute__((__no_instrument_function__))
#else /* !__GNUC__ */
#define RPM_GNUC_PRINTF( format_idx, arg_idx )
#define RPM_GNUC_SCANF( format_idx, arg_idx )
#define RPM_GNUC_FORMAT( arg_idx )
#define RPM_GNUC_NORETURN
#define RPM_GNUC_CONST
#define RPM_GNUC_UNUSED
#define RPM_GNUC_NO_INSTRUMENT
#endif /* !__GNUC__ */
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
#define RPM_GNUC_DEPRECATED \
__attribute__((__deprecated__))
#else
#define RPM_GNUC_DEPRECATED
#endif /* __GNUC__ */
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
#define RPM_GNUC_MAY_ALIAS __attribute__((may_alias))
#define RPM_GNUC_NONNULL( ... ) \
__attribute__((__nonnull__ (__VA_ARGS__)))
#else
#define RPM_GNUC_MAY_ALIAS
#define RPM_GNUC_NONNULL( ... )
#endif
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define RPM_GNUC_WARN_UNUSED_RESULT \
__attribute__((warn_unused_result))
#else
#define RPM_GNUC_WARN_UNUSED_RESULT
#endif /* __GNUC__ */
#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
# define RPM_GNUC_INTERNAL __attribute__((visibility("hidden")))
#else
# define RPM_GNUC_INTERNAL
#endif
/* Guard C code in headers, while including them from C++ */
#ifdef __cplusplus
# define RPM_BEGIN_DECLS extern "C" {
# define RPM_END_DECLS }
#else
# define RPM_BEGIN_DECLS
# define RPM_END_DECLS
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Rpm specific allocators which never return NULL but terminate on failure */
RPM_GNUC_MALLOC RPM_GNUC_ALLOC_SIZE(1)
void * rmalloc(size_t size);
RPM_GNUC_MALLOC RPM_GNUC_ALLOC_SIZE2(1,2)
void * rcalloc(size_t nmemb, size_t size);
RPM_GNUC_ALLOC_SIZE(2)
void * rrealloc(void *ptr, size_t size);
char * rstrdup(const char *str);
/* Rpm specific free() which returns NULL */
void * rfree(void *ptr);
/** \ingroup rpmutil
* Memory allocation failure callback prototype. When registered through
* rpmSetMemFail(), this gets called if memory allocation through rmalloc()
* and friends fails. If the application can somehow recover memory here,
* it can return a newly allocated memory block of requested size, otherwise
* it must return NULL after performing it's own shutdown deeds or
* terminate itself.
* @param size Size of allocation request in bytes
* @param data User data (or NULL)
* @return Allocated memory block of requested size or NULL
*/
typedef void * (*rpmMemFailFunc) (size_t size, void *data);
/** \ingroup rpmutil
* Set memory allocation failure callback.
* @param func Allocation failure callback function
* @param data User data (or NULL)
* @return Previous callback function
*/
rpmMemFailFunc rpmSetMemFail(rpmMemFailFunc func, void *data);
#ifdef __cplusplus
}
#endif
#endif /* _RPMUTIL_H */
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